I want to read a CSV file in Java and sort it using a particular column. My CSV file looks like this: Considering I want to sort it using the third column, my output should look like: After some research on what data structure to use to hold the data of CSV, people here suggested to use Map data structure
JavaFX Table Cell Editing
I am trying to make a program in Java to manage my bookie accounts. I’m new to java, so I thought I would chose something simple to see how things work. I decided to use a tableview and make the individual cells editable. I’ve been following this tutorial http://java-buddy.blogspot.co.uk/2012/04/j…
On Which Line Number Was the Regex Match Found?
I would like to search a .java file using Regular Expressions and I wonder if there is a way to detect one what lines in the file the matches are found. For example if I look for the match hello with Java regular expressions, will some method tell me that the matches were found on lines 9, 15, and 30?
How to save a Jsoup Document to an HTML file?
I have used this method to retrieve a webpage into an org.jsoup.nodes.Document object: myDoc = Jsoup.connect(myURL).ignoreContentType(true).get(); How should I write this object to a HTML file? The methods myDoc.html(), myDoc.text() and myDoc.toString() don’t output all elements of the document. Some in…
synchronize two threads in java
I have two threads in my java programme, one is main thread and other thread is thread A which is spawned in main thread. now i want main thread to start thread A and wait till thread A has executed some part of its code in run method and thread A should suspend itself. main thread should then start running,
How to set JAVA_HOME in Linux for all users
I am new to Linux system and there seem to be too many Java folders. java -version gives me: java version “1.7.0_55” OpenJDK Runtime Environment (rhel-2.4.7.1.el6_5-x86_64 u55-b13) OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode) When I am trying to build a Maven project , I am getting error…
Assets folder in Android Studio Unit Test
I have a Gradle project with the following structure: Now I want to add a unit test which uses a resource (either “raw” or “asset”). I put my resource into project/androidTest/assets/test_file and access it with getContext().getResources().getAssets().open(“test_file”); (in…
Java project with Gradle in IntelliJ IDEA: cannot resolve symbol ‘google’ but project compiles
I have a toy Java project set up with Gradle in IntelliJ IDEA 13.1.2. It compiles and runs fine, but the IDE highlights ‘google’ in as red and warns “Cannot resolve symbol ‘google’”. Any idea how to fix it? I have tried 1) deleting .idea/ and re-creating the project in IntelliJ I…
Java swing repainting while computing: animating sorting algorithm
http://www.youtube.com/watch?v=M0cNsmjK33E I want to develop something similar to the link above using Java Swing. I have the sorting method and did while repaint but when I triggered the sorting, instead of showing the bars slowly sorting itself, it freezes and then unfreezes when the array has been fully so…
Why stack using array why not linkedlist
Why Stack is implemented using array not using linkedlist ? If you use add to front and remove from front in the linkedlist than it can be efficient way of of implementing stack, instead of working …